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प्रश्न
A dilute acid B does not normally give hydrogen when reacted with metals but does give a gas when it reacts with copper. Identify B. Write the equation with copper.
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उत्तर
The dilute acid is nitric acid (HNO3).
Reaction:
\[\ce{\underset{Copper}{3Cu} + \underset{acid}{\underset{Dil. nitric}{8HNO3}} -> \underset{Copper nitrate}{3Cu(NO3)2} + \underset{monoxide}{\underset{Nitrogen}{2NO}} + 4H2O}\]
संबंधित प्रश्न
Write a balanced equation for the action of heat on a mixture of copper and concentrated nitric acid.
Give two chemical equations for the following:
Nitric acid showing as acidic character.
Name the Following:
Two coloured nitrates.
What do you observe when?
Concentrated nitric acid is dropped on a hot surface?
What happens when (Given balanced equation) :
Sulphar is added to hot and conc. HNO3?
Complete and balance the following equation :
HNO3 + FeSO4 + H2SO4 → ______________
Choose the correct answer from the option given below :
When treated with nitric acid which of the following liberate hydrogen?
Write a chemical equation to illustrate the acidic nature of nitric acid.
What is the special feature of the apparatus that is used in the laboratory preparation of nitric acid?
X, Y and Z are three crystalline solids that are soluble in water and have a common anion.
To help you to identify X, Y and Z, you are provided with the following experimental observations. Copy and complete the corresponding inferences in (a) to (e).
- A reddish-brown gas is obtained when X, Y and Z are separately warmed with concentrated sulphuric acid and copper turning added to the mixture.
INFERENCE 1: The common anion is the ______ ion. - When X is heated, it melts and gives off only one gas which re-lights a glowing splint.
INFERENCE 2: The cation in X is either ______ or ______. - The action of heat on Y produces a reddish-brown gas and yellow residue which fuses with a glass of the test tube.
INFERENCE 3: The metal ion present in Y is the ______ ion. - When Z is heated, it leaves no residue. Warming Z with sodium hydroxide solution liberates a gas which turns moist red litmus paper blue.
INFERENCE 4: Z contains the ______ cation. - Write the equations for the following reactions:
- X and concentrated sulphuric acid (below 200°C). (One equation only for either of the cations given in INFERENCE 2)
- The action of heat on Y.
- Concentrated nitric acid is added to copper turnings kept in a beaker.
